Question

Why p-wave superconductors are rare in nature?

Answer 1

The superconducting properties of CeCu2Si2, a type of heavy fermion material, were reported in 1979 by Frank Steglich.[1] For a long time it was believed that CeCu2Si2 is a singlet d-wave superconductor but recently, it has become clear that this is not correct.[2] In the early eighties, many more unconventional, heavy fermion superconductors were discovered, including UBe13,[3] UPt3 [4] and URu2Si2.[5] In each of these materials, the anisotropic nature of the pairing is implicated by the power-law dependence of the nuclear magnetic resonance (NMR) relaxation rate and specific heat capacity on temperature. The presence of nodes in the superconducting gap of UPt3 was confirmed in 1986 from the polarization dependence of the ultrasound attenuation.[6]

The first unconventional triplet superconductor, organic material (TMTSF)2PF6, was discovered by Denis Jerome and Klaus Bechgaard in 1979.[7]Recent experimental works by Paul Chaikin's and Michael Naughton's groups as well as theoretical analysis of their data by Andrei Lebed have firmly confirmed unconventional nature of superconducting pairing in (TMTSF)2X (X=PF6, ClO4, etc.) organic materials.[8]

Answer 2

Answer:

The p-wave superconductivity is a phase of matter where produces when the electrons are bounded with parallel spins by exchange of the electronic excitations with angular momentum ℓ = 1 and condense in a triplet state.